Note 6 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Allocated stock-based compensation expense	$ 10,122	$ 8,924	$ 7,323
Cost of Subscription [Member]
Allocated stock-based compensation expense	252	161	113
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	497	384	299
Cost of Professional Services [Member]
Allocated stock-based compensation expense	1,219	1,085	848
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	2,111	1,510	1,200
Research and Development Expense [Member]
Allocated stock-based compensation expense	1,620	1,226	1,009
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 4,423	$ 4,558	$ 3,854